Some interesting information about monster cars:
Monster Truck - a car, usually stylized truck, modified or purpose-built with very large wheels, suspension with long stroke and very powerful engine.
They are used for competition and popular sports entertainment and in some cases they are featured alongside motocross races, mud bogging, tractor pulls and car-eating robots.
Modern bigfoots are wheel-drive beach buggies larger size. As such, they do not pickup trucks, and they got their name solely because of the shape of the fiberglass body, which is used in such vehicles. Tubular chassis with four-point suspension is created individually for each truck and to create a ground clearance of up to 4 feet.
Mounted just behind the driver on most trucks are the engines, which are typically supercharged and run on methanol an alcohol and corn-based oil, and have displacement up to 575 cubic inches (9.42 L). Axles are mostly taken from either heavy-duty military trucks or road vehicles like school buses, and are modified to have a planetary gear reduction at the hub to help turn the tires.
There is a near term "all-road vehicle", more accurately defining the purpose of off-road vehicles: the movement both on roads with improved pavement, and on the roads does not cover, but still on the roads.